A nonabsorbable, sterile, surgical, monofilament suture composed of the long-chain, aliphatic polymers Nylon 6 and Nylon 6.6. ETHILON suture is dyed black or green to enhance visibility in tissue. It is also available undyed (clear). ETHILON Nylon Suture is indicated for use in general soft tissue approximation and/or ligation, including use in cardiovascular, ophthalmic, and neurological procedures. ETHILON Suture elicits a minimal acute inflammatory reaction in tissue, which is followed by a gradual encapsulation of the suture by fibrous connective tissue. While nylon is not absorbed, progressive hydrolysis of the nylon in vivo may result in gradual loss of tensile strength over time.